Rotary impact-motor.



No. 852.293. PATENTED APR. 30, 1907.

J. T. PRITGHARD.

ROTARY IMPACT MOTOR.

APPLICATION TILED SBP'I.2,1904.

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PATENTED APR. 30, 1907.

J. T. PRITGHARD,

ROTARY IMPACT MOTOR.

APPLICATION FILED SEPT. 2.

JOHiN T. PRITCHARD, OF NEYVARK, NEW JERSEY.

ROTARY lMPACT-MOTOR.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed September 2.1904. sci-a1 No. 223,148.

T all whom it may concern.-

Be it known that 1, JOHN T. PRITCHARD, a citizen of the United States, residing at No.

.20 Astor'street, .Newark, in the county of Essen and State of cw Jersey, have invented certain new and useful Improvements in Rotary Impact-Motors, of which the follow .in is specification.

11y invention relates to motors employing a rotary piston or wheel upon which the motive fluid, whether of gaseous or liquid na ture, acts by impact and reaction, and has for its object to increase the elliciency of such a motor by the use of a novel form of wheel or rotating piston, the novelty consisting par ticularly in the peculiar construction and ar rangement of the buckets, pockets or recesses disposed at the periphery of the wheel and into which the motive fluid is discharged.

Other improvements are embodied in my invention and will be hereinafter described.

Figure 1 is a side elevation of a motor embodying my improvements, a part of the easing being broken away and the nozzle being in vertical section. Fig. 2 is a vertical soctional view taken on the line 2-2 of F ig. 1. Fig. 23 is a perspective view, enlarged, of a small portion of the adjacent parts that to,

gether constitute the wheel or rotary piston of the motor, the parts being separated to show their construction. Fig. 4 is an edge view of a. small section of the rotary wheel or piston. 1* ig. 5 is an elevation, parts being in section, of the valve controlling the inlet- 'pa ssage to the motor. Fig. 6 is a detached perspective view of the adjustable member of the valve. Fig.7 is a transverse sectional view of the valve taken on the line '7--7 of Fig. 5.

The impact wheel or rotary piston of the motor is providedwvith a series of peripherally arranged buckets or pockets into which is discharged the motive iluid from a nozzle arranged tangentially, or approximately so, to the Wheel and opposite the periphery thereof, and as close thereto as possible. The motive lluid after being delivered to the 5 wheel and having performed its oliiee in the rotation thereof, is quickly discharged.

In the drawings 2 designates the casing in which the rotary wheel or piston of the motor is mounted. A nozzle 3 enters the casing and through it is delivered the fluid that acts upon the wheel. This fluid may be obtained from any suitable source. It may be a liquid delivercd from a reservoir so situated as to impart to the liquid the necessary velocity as it issues from the nozzle; or it may be steam delivered from any suitable source of su 1y; or it may be any other gaseous body, sue i as the products prmluced by the burning of a hydrocarbon gas. The source of supply of the fluid that passes through the nozzle is immaterial so far as my invention is concerned. The rotary piston or Wheel is mounted upon ashal't from which. the power dcvelopcd by the motor is taken and ui ilized. The wheel consists essentially of a hub 5 secured to the shaft, a web portion 6, and a rim. portion 7. In the latter are formed the buckets, pockets, or recesses 8 into which the motive [luid is discharged. These are separated from each other and partially formed by division walls 9 that are preferably formed integral with the lllll portion 7 of the wheel. The disposition and arrangement of the division walls separating the buckets or pockets is peculiar, each wall being formed of two parts that are preferably of equal length and converge from the opposite sides of the wheel, the line where they meet being situated in the central transverse plane of the.

wheel. I have found that the best results are obtained when the two parts of the, division walls are disposed at an angle of approxi mately 45 degrees to each other. The division walls do not extend out radially, but are rather inclined backward, that is, in a direction opposite to that in which the Wheel turns, and the inclination that I have found to give the best result is of approximately 22}, degrees.

The division walls are arranged quite close to each other and n'ei'crably taper from their bases outward. r s already stated, the division walls 9 are referably integral with the tlangc portion of the wheel in order to give the necessary strength and they may be formed by milling machinery, such as is employed in cutting teeth in gearing.

In order to produce a wheel such as I have described, that is with the Walls that Separate the peripheral buckets inclined and formed of -.onverging portions, as stated, by the use of milling machinery, I have found it desirable to make the wheel of two parts, each part carrying only those portions of the division walls that incline transversely in one direction. The two parts are brought together and securely united by bolts 10, or other uniting means, the line of union being the central plane of the wheel, where the two converging parts of the division walls meet. The wheel or rotary piston is provided with a pair-of c-nnular side flanges ll lli, suitably secured to the rim portion of the wheel and arranged to close the pockets 8 at theirsides. These flanges extend outward for a short distance beyond thepcripheral edges of the divisionwalls 9, and the delivery end of the nozzle Sis disposed between them;

is indicates-the discharge through which the motive fluid, after having acted upon the wheel, is delivered. It is desirable that the pressure at the discharge 14 should be as low possible in order that the reactive force of the motive fluid on leaving the wheel shall be correspondingly high. I therefore find it desirable under some circumstances to arrange an exhaust device in connection with the discharge passage of the motor; For the purpose of illustration, I have represented this exhaust device as consisting of it fan 16 that maybe driven from any suitable sort of power, it being represented as geared to and driven from the shaft 4 of the motor.

In order to control the delivery of the motive-fluid to the nozzle 3 I make use of two valves, a controllin valve 17, which may be of any usual or pre erred construction, and e cutofl' valve 18. The latter is situated within a three-way section of the supply pipe, one branch, 19, of which leads from the main supply pipe 20 directly to the nozzle, while the other branch 21 leads into the open air, con.

uniting the fluid passages 20,and 19, while the other face, 31, is straight or corresponding with the direction ol the passage between the passages 20 and 21. nection in which is situated the valve in is formed of two parts 32, 32, separated along the central longitudinal plane of the connectirm, taken as a whole, and suitably united alter the valve has been fitted to its seats. In euch'purt 32 is formed a flat seat 33 against which one side cdgc of the valve moves. The outer end or edge 34 of the valve is curved and is arranged to be seated against curved valve souts 35, situated on opposite sides of the fluid passage 20 and formed one half in each section 32. This construction of valve may be worked easily and quickly, is steam tight, and cruises on easy and smooth flow whichever way it may be set. 1

I proposcti, use in}; motor for propelling automobiles and to generate the motive fluid by the combustion of charges of a hydrocar- "bon vapor. in such cases there might be sparks or inca-ndescent gases discharged from the wheel, though I consider this to be en lilrel y. Therefore to guard against all possibility of danger from fire due to the heated condition of the discharge from the wheel, I

propose to form an opening 36 in the casing,

which may be of funnel shape or to which cc funnel attachment may be applied, so that tlic forward movement of the vehicle will cause large quantities of air to mingle with the gases discharged from the wheel to cool them below the danger point. The casing may, if found desirable, be arranged in close proximity to the peripheral edges of the division wall 9, between the flanges 11, for a suitable distance beginning at a point just in front of the nozzle, though I do not wish to .be limited to this feature of construction. Nor do I wish to be limited to the exact shade of the buckets and se arating division walls illustrated. The ang e at which they are set on the periphery of the wheel may be varied within certain limits, and the relation of the two parts of tlie'division wallswhich converge toward the transverse center of the wheel with reference to each other may be changed within certain limits from that shown;

be inclined backward and that each should be formed of two parts which converge from the opposite sides of the wheel towareb the transverse center thereof. 1 Such a wheel when used 1 connection with a supply norm zle that delivers peripherally and with o. dis charge passage, from which the moiix e fluid is delivered peripherally from the wheel has been found to devclopgroat power and to be an exceedingly clligicnt clement oi' a motor.

l have shown the motor as provided with but one nozzle3, as this fully illustrates my invention, but I. do not wish tlicrcby to limit my invention to such a motor, as the number of nozzles employed may be increased if eX-' perionce shows this to be desirable.

What I claim is:

1. A wheel or piston for an impact rotary motor provided with a series of peripheral l'uu'lccts whose division walls incline roui'wo-rd and are each composed of two parts that converge from the opposite sides of the wheel toward the transverse central piano tlwrcof, substantially as set forth.

2. A wheel or piston for an impact rotary motor provided with a series of peripheral buckets separated from each other by division wells, \vhicli'walls incline. reurward at approximately an angle of 22tdcgrccs mid each of which is formed of two ports disposed approximately at an angle of 45 degrees to ouch other, tllcir mcciiug cdgcs being in the central transverse plane of'tlre wheel, substantially as set forth.

ii). In a motor of the rotary impact type arranged to he driven by highly he lIU l gases, the combination of the rotary whccl. tho non-- zlc, and the itSil'lQ prm'irlctl with it ilischm'g c passage for the gases after they haw acted on. the wheel, and an. air passagc 36 adjacent to the discharge passage through which a ll may be passed to mix with the discharged to cool the szunc, tho outer largor cm] of said passage being adapted to hc lcl't open to the atmosphere SL1lL)Sttifiti&tll Y sct forth.

4. in a rotary impact motor, thc comhinu.

conno'ction. one branch thereof lining; con- 1 nccted with tho supply pipe and iinothm' with the nozzle, and the conncction beingformed of two parts, ths plane of S(}')2tlttll(m between them being at the central liiisig 'itudh na hlimc of the connection considcrod as :1-

whoie, and :ivalve arranged within the threc- Way connection for diverting 'th either to the nozzle I stun tially as set forth.

supply l l l l l l 1 l r l 4 l l l .sss

5. in a. rotary impact motor, the": cmnhinw- Lion of tho whocl. the nozzle, 2t thr ce-why connection, one hmnch thereof hcingconncvlci'l with thc supply pipc and zinothci with the nozzle, tho connmzthm hciny; l' r.m0 l of two parts, thc plzmc oi" icpm'aiion hctwccn thcin hcing at the central longitudinal plane of thc coi'incction considered as 2t whole, and thcrc being formed in each part of. thc connection vali'c scnts 33, 35, ltllkl n i'ailx cfivithin thc connccthim fitted to the said valveseats, tlon 01 the wheel, the nozzlc, =1- thri-mw'ny 5 and having onc ta e-c slmpml to correspond with thc (.lh'cction of tho liniil. passage lictwccn the supply pipc and thc branch that is united with the nozzlc, and the other face shaped to coi'l'cspond with the iluid passage hctwcm'i the supply pipe and the' other branch, snl stzinlially as setforth.

J'N O. T. 'PlH'lUFARD Wit ncsscs:

G. W. Moonic, G. 31.. Bimiis, Jr. 

